Adjustable ladder



FIG. 1 is a front elevational of the adjustable ladder showing my newdesign;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines are for illustrative purposes only and form no part ofthe claimed design.

The ornamental design for the adjustable ladder, as shown and described.